. >> at the state highway administration's command center, laura is keeping tabs on the developing forecast. >> it's never a good time to drive at the onset of a storm. so if you are planning on traveling this weekend keep a close eye on the winter storm on saturday, and if possible, delay travel until later in the afternoon after the storm passes or even into sunday. we're pre-treating roads right now in the d.c. and baltimore metropolitan areas with the idea of being proactive, placing salt brine on the road. >> reporter: the snow is expected to start before dawn and continue throughout the day. there are travel advisories in just about every direction you could be moving except towards maryland's eastern shore. so, be ready. in maryland, scott broom, 9news now. >> be ready, that's good advice from scott broom. now, in washington, d.c., there's the first full deployment of salt and sand trucks, to be on the streets by 4:00 a.m. >> erica, what is the latest? >> that's right around when the precipitation is to be arriving so good idea to jump the gun and get those salt trucks out before the